ML20084N583

Monthly Statistical Rept 84-04 for Apr 1984

ML20084N583
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	04/30/1984
From:	Burger F, Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
84-04, 84-4, VYV-84-206, NUDOCS 8405170104
Download: ML20084N583 (7)

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VERMONT YAtKEE NJCLEAR POWER STATION I

MONTHLY STATISTICAL REPORT 84-04 FOR THE M) NTH OF April,1984 l

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I OPERATING DATA REPORT DOCKET NO.

50-271 DATE 840510 COMPLETED BY FJ Burner TELEPHONE 802/257-7711 OPERATING STATUS Notes

1. Unit Name:

v. ~., v.

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2. Reporting Period:

April

3. Licensed Thermal Power (W t):

1593

4. Nameplate Rating (Gross We):

540

5. Design F,lectrical Rating (Net We): 514 (OC)504 (cc)

6. Maximus Dependable Capacity (Gross We):

535

7. Maximum Dependable Capacity (Net We):

et

8. If Changes Occur in capacity Ratings (Items Number 3 Through 7) Siree Last Report, Give Reasons:

N/A i

9. F:ver Level to Which Restricted.If Any(Net We):

N/A i

10. Re sons For Restrictions If Any:

w/A l

I This Month Yr-to-Data Cumulative

~~~~~

11. Hours In Reporting Period 719.00 2903.00 j12.NumberofHoursRasetorWascritical 706.07 2782.68 82481.33 i 13. Re:ctor Reserve Shutdown Hours 0.00 0.00 0.00

! 14. Hours Generator On-Line 701.67 2752.37 80244.95

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gr:ss Thermal Energy Generated (WR) 1061021.00-4246283.s0 116406963.00-1 17. Crass Electrical Energy Generated (WH) 360710.00-1442688.00 38735766.00

18. Net Electrical Energy Generated (WH) 34)774.00 1384243.00 36749259.00

19. Unit Service Factor 97.59 94.81 78.85 4

20. Unit Availability Factor 97.59-94.81 78.85

)21.UnitCapacityFactor(UsingMDCNet) 95.42 94.61 71.65

22. Unit capacity Factor (Using DER Wet) 93.56 92.77 70.26

23. Unit Forced outage Rate 2.41 5.19 7.30

! 24. Shutdowns Scheduled Over West 6 Months (Type. Date. and Duration of Each):

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25. If Shut Down At End Of Raport Period. Estimated Date of Startup:

26. Unite In Test Status (Frior to Commercial Operation):

Forecast Achieved 1

INITIAL CRITICALITY INITIAL ELECTRICITY COMIERCIAL OFIRATION 3

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AVERAGE DAILY UNIT POWER LEVEL

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DOCKET NO.

50-271 UNIT Ve mont Yankee DATE 840510 COMPLETED BY FJ Burger TELEPHONE 802/257-7711 MONTH u43 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 17.

253 1.

sta 2.

519 18.

385 3.

519 19.

345 4

518 20.

443 21.

438 5.

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522 27, 420 12.

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518 29.

506 13.

521 30.

518 14.

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167 INSTRUCYIONS:

On this format, list the' average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.

UNIT SilUTDOWNS AND POWER REDUCTIONS DOCKET NO sn-m UNIT NAME y,r.nne yonn,,

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REPORT MONTH Aor 11 COMPLETED BY FJ Burger TELEPHONE 802/257-7711 m

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License No.

Date j

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84-06 840415 S

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4 N/A RB CONROD Power reduction for control rod pattern Power adjustment and other surveillance.

Reductio 1 84-07 840416 F

17.33 A

3 LER CD VALV0P During testing an inboard MSIV went fully 1

84-04 shut causing a high steam flow signal and a Group I isolation which generated the scram.

Caased by a stuck spool in the actuator test pilot valve. Spool valve assembly contained dirt. The test pilot valve was replaced. See LER 84-04.

84-08 840420 S

0 B

4 N/A RB CONROD Power reduction for control rod pattern j

Power exchange and equipment surveillance.

Reductto 1 l

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Method:

Exhibit G-Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data B-Maintenanct

-Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Re.

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(NUREG 0161)

E-Operator Train t 5 License Examination 3

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DOCKET NO.

50-271 UNIT Vermont Yankee DATE 840510

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COMPLETED BY FJ Burner TELEPHONE 802/257-7711 REPORT MONTH April

SUMMARY

OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 92.63% of rated thermal power for the month.

Gross electrical generation was 360,710 MWH, or 92.90% of design electrical capacity.

Operating summary The following is a chronological description of plant operations including other pertinent items of interest for the month:

At the beginning of the reporting period the plant was operating at 99.9%

of rated thermal power.

840415 At 0030 hrs. a power reduction was initiated for concrol rod pattern adjustment and equipment surveillence.

840415 At 0208 hrs. a return to full power was started.

840416 At 0742 hrs. the reactor automatically scrammed because of an inad-vertent MSIV closure (See Unit Shutdowns and Power Reductions).

840416 At 2038 hrs. the reactor was critical.

840417 At 0102 hrs. the generator was phased onto the grid.

840420 At,2000 hrs. a power reduction was initiated for a control rod pattern exchange and equipment surveillance.

840420 At 2150 hrs. a return to full power was started.

At the end of the reporting period the plant was operating at 99.9% of rated thermal power.

VERMONT YANKEE NUCLEAR POWER CORPORATION P. O. BOX 157 GOVERNOR huh ~r ROAD VERNON, VERMONT 05354 VYV 84-206 May 10, 1984 U. S. Nucler Regulatory Commission Director, Office of Management Information and Program Control Washington, D.C.

20555

Dear Sir:

Submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of April,1984.

Very truly yours, VERMONT YAWEE NUCLEAR POWER CORP.

W Warren P.

rphy I

Vice President and Manager of Operations WPM:FM/pt:403.011.1

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